<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
<style>
    .box1{
        width: 300px;
        height: 300px;
        background: linear-gradient(to top,red,blue);
    }
    .box2{
        width: 300px;
        height: 300px;
        background:radial-gradient(blue,red);
        margin-top: 20px;
    }
</style>
</head>
<body>
    <div class="box1"></div>
    <div class="box2"></div>
</body>
</html>